Equivalent parameter measuring method and device of ultrasonic transducer and controller

The invention relates to an equivalent parameter measuring method and device of an ultrasonic transducer and a controller. The method comprises the following steps: acquiring an initial frequency sweeping interval, and performing frequency sweeping on the ultrasonic transducer at a first step length in the initial frequency sweeping interval so as to acquire a first half-power point and a second half-power point of the ultrasonic transducer; wherein the first step length is an increasing step length; performing frequency sweeping on the ultrasonic transducer at a second step length in a target frequency sweeping interval to obtain a first feedback electrical parameter set of the ultrasonic transducer; the target frequency sweeping interval is a frequency band between the first half-power point and the second half-power point; and obtaining equivalent parameters of the ultrasonic transducer according to the first feedback electrical parameter set. By adopting the method, the time consumption for measuring the